Okay, stupid question. My manual says the lower bulb in the OEM headlight is a "Parking Lamp." It doesn't do anything on my bike. Upon further inspection, it's a bulb with no wires. Not sure if this is an option for non-US markets, or if the previous owner at some point disabled for some unknown reason. I can't find any broken wires in the rats nest behind the headlamp, so I don't thinks it's accident related.